EP2435785A1

EP2435785A1 - Aiming optical device

Info

Publication number: EP2435785A1
Application number: EP10712405A
Authority: EP
Inventors: Martin Sinner-Hettenbach; Peter Wolf; Oliver Wolst; Tatiana Babkina
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2009-05-25
Filing date: 2010-03-29
Publication date: 2012-04-04
Anticipated expiration: 2030-03-29
Also published as: EP2435785B1; WO2010136236A1; DE102009026435A1; US20120154782A1; CN102449432A

Abstract

The invention is based on an aiming optical device for a measuring instrument, more particularly for a distance measuring instrument (12; 12a) comprising an optical unit (14; 14a), having at least one optical deflection unit (16; 16a) and a first optical lens element (18; 18a). It is proposed that the optical deflection unit (16; 16a) and the first optical lens element (18, 18a) are embodied integrally with one another at least in part.

Description

description

Aiming optics device

State of the art

The invention relates to a target optical device according to the preamble of claim 1.

A target optical device for a measuring device with an optical unit is already known. The optical unit has an optical deflection unit and an optical lens element.

Disclosure of the invention

The invention is based on a target optical device for a measuring device, in particular for an electro-optical distance measuring device, with an optical unit which has at least one optical deflecting unit and a first optical lens element.

It is proposed that the optical deflecting unit and the first optical lens element are at least partially formed integrally with each other.

In this context, a "target optics device" should be understood to mean, in particular, a device and / or a unit which is provided for aligning the measuring device, in particular the distance measuring device, with respect to a measuring object, such as a wall, and / or sighting a measuring object before a measuring operation by means of the measuring device by an operator allows. Furthermore, an "optical deflection unit" should be understood to mean, in particular, a unit which is provided for deflecting a light and / or laser beam and / or a similar beam, the deflection being effected by reflection at reflection surfaces, such as mirror surfaces and / or. or prism surfaces, and / or by refraction of the incident ones

Beams, such as by means of a prism can be done.

The light beam and / or the beam may in this case be formed by a beam and / or a beam of an image, such as an image of a measurement object. A beam direction of a beam and / or ray bundle incident on the deflection unit differs from a beam direction of a beam and / or beam leaving the deflection unit, wherein an orientation of individual beams, in particular of the same wavelength, is equal to each other within the beam before and after the deflection ,

An "optical lens element" is to be understood as meaning, in particular, a refractive element, which may be a single lens or a group of lenses, for which purpose the optical lens element has at least one, preferably two refractive surfaces, of which at least a curved surface, in particular a concave or convex curved surface is formed with a focal length, wherein by means of the curved surface, the rays can be focused in particular to a point or the rays diverge.An article can be enlarged or reduced by the optical lens element or the same be displayed large.

The design of the target optics device according to the invention makes it possible to advantageously achieve a particularly compact target optics device while saving further installation space, additional components and costs In addition, an advantageous coordination between the optical deflection unit and the optical lens element with regard to a beam guidance in a design and / or a production of the optical unit can be achieved and then the optical deflection unit together with the first optical lens element as a structural unit in one step into the measuring device, especially the Laser rangefinder, mounted pre-adjusted. Particularly advantageously, the distance measuring device is formed by a laser rangefinder.

An advantageous deflection and / or deflection of an incident beam, in particular of a light and / or laser beam, can be achieved if the optical deflection unit has a prism. In this case, the optical deflecting unit particularly advantageously has at least one pentaprism, in particular the prism is formed by the pentaprism, whereby a compact optical unit with an advantageous beam guidance can be achieved, wherein, in particular, a complicated adjustment of individual components, such as mirror surfaces, is at least partially dispensed with each other can be made by integrally formed with the pentaprism.

It is further proposed that the optical deflection unit is at least partially formed by an optical injection-molded component. This is under a

"Optical injection-molded component", in particular a light-conducting, at least partially transparent injection-molded component, which is particularly advantageously at least partially made of a material with a transparent and non-polar thermoplastic, such as, for example, the cyclo-olefin polymer Zeonex optical injection-molded component and a transparent polycarbonate and / or a thermoplastic material, such as in particular a polymethyl methacrylate and / or further, the skilled person appear to make sense transparent materials.

Preferably, the optical lens element is integrated in the optical injection-molded component and integrally formed or at least partially integral therewith, so that a compact optical unit can be achieved, which can also be structurally easily integrated into the meter. Partly in one piece in this context means that at least one element of a multi-part optical lens element is integral with or in the optical

Injection molded component is integrated. Furthermore, it can be achieved that the optical lens element and / or further optical elements integrated in the optical deflection unit only have to be fixed and / or adjusted relative to one another during production of the optical injection-molded component and / or subsequent and in particular undesired movement of a component and / or or an element out of an adjusted position can be advantageously prevented can. In addition, a particularly lightweight and in particular cost-effective measuring device can be realized and thus a high level of user-friendliness can be achieved.

Furthermore, it is proposed that the first optical lens element is at least partially formed by a converging lens. Preferably, the converging lens has at least partially a function of a lens of the optical unit. It can be achieved by this embodiment of the invention, the lens of the optical unit space saving and in particular fixed within the optical unit with respect to further optical elements of the optical unit, such as the optical

Deflection unit, to be arranged. Furthermore, it is basically conceivable that the first optical lens element is formed by a diverging lens and / or an optical lens system.

It is also proposed that the optical unit has at least one concave mirror or acts as one, wherein it is formed by the first optical lens element. In this case, the optical lens element is particularly advantageously formed by a converging lens whose inner side or its side facing the center of the prism has at least partially the function of a hollow mirror. It can be an advantageous combination of functions

Savings of other components, space, assembly time and costs can be achieved advantageous. In particular, in this case during a measurement, the light beam and / or the laser beam are partially reflected on the serving as a concave mirror element and thus directed as a target in the direction of the operator and / or an eye of the operator, while means of the remaining part of a beam measurement, in particular a Distance measurement can be made.

In an advantageous development of the invention, it is proposed that the optical unit has at least one second optical lens element, which is formed in one piece or at least partially in one piece with the optical deflection unit. It can be realized a particularly compact optical unit, which can be made in advance and which can be preferably installed as an optical unit during assembly and / or manufacture of the measuring device, in particular the Laeserfernungsmessgeräts, saving additional assembly steps. In addition, both optical lens elements can be advantageous here be coordinated with each other, both optical lens elements are in particular formed integrally with the optical injection molded component. Preferably, an optical main plane of the second optical lens element is arranged substantially perpendicular to a main optical plane of the first optical lens element.

Particularly advantageously, the second optical lens element is at least partially formed by a diverging lens. Preferably, the diverging lens has at least partially the function of an eyepiece of the optical unit.

It can be realized by this embodiment of the invention, an image of a measuring object according to a principle of a Galilean telescope, which preferably displays an upright and especially enlarged image of the measuring object, so that a good readability and / or orientation of a targeted measuring point for the operator can be achieved can. In principle, however, it is conceivable that the second optical lens element is formed by a converging lens and / or an optical lens system. Preferably, the first optical lens element and the second optical lens element are adjusted and / or arranged such that in the eye of an operator, in particular on the retina, a sharp image is formed, the particularly advantageous regardless of a distance of the eye to one of the optical Lens elements, in particular of the second optical lens element, is.

In an alternative embodiment of the invention, it is proposed that the

Optical unit has at least one coating which is arranged on or in at least one surface of the optical deflection unit. In this context, a "coating" is to be understood as meaning, in particular, a layer applied on or in a surface of the optical deflection unit, wherein material properties of the applied layer are preferably different from the material properties of the optical deflection unit aligned, for example, an at least partially dielectric coating for a surface designed as a reflecting or reflecting surface. in particular metallic materials, such as for example of a silver material may be formed.

By means of this embodiment of the invention and in particular by means of a dielectric coating, it is advantageously possible to modify an optical property of the surface of the optical deflecting unit. In particular, a refractive index of the coating can be different from a refractive index of the optical deflecting unit and / or a filter property can be achieved the coating for on the optical deflection unit incident or exiting light rays are changed. In addition, the different surfaces of the optical deflection unit can be provided with different coatings, such as a reflective coating for the production of reflective surfaces or mirror surfaces, a dielectric coating for a partial reflection of the light beam, in particular of the laser beam, on the coated surface etc. The individual coated surfaces can also differ in a layer thickness of the coating, so that different optical properties can be produced in the same coating material, such as different transmission properties for a light and / or laser radiation. In addition, a dielectric coating can be applied quantitatively to the surface to be coated with a high process reliability.

It is also proposed that a coating at least partially forms a reflective surface of the optical deflection unit, whereby the target optical device can be realized in a structurally simple manner while saving further components, construction space and costs. In particular, in this case an advantageous matching of the reflecting surface with other components and / or elements of the optical deflection unit, in particular further reflecting surfaces, and / or the first and / or the second optical lens element can be achieved and a subsequent adjustment can be advantageously prevented and saved ,

It is proposed that at least two reflective surfaces of the optical deflection unit enclose an angle of substantially 45 ° to one another, even if these surfaces do not have a common vertex or a common vertex line. It can be an advantageous Strahlfüh- tion of the light beam and / or the laser beam from the lens designed as a converging lens can be achieved on the designed as a diverging lens and aligned substantially perpendicular to the lens eyepiece. In particular, in this case a target optics device can be achieved according to the Galilei principle with an enlarged and in particular upright image.

Particularly advantageously, the optical lens element in the form of a converging lens has on at least one surface an at least partially reflecting and / or reflecting coating and / or a transmission property of a lens surface can be reduced by means of the coating, so that the converging lens together with the coating at least partially fulfills the function of Concave mirror for light and / or laser radiation, which meet from a direction starting from a center of the optical deflection unit on the converging lens. A reflection of light and / or laser beams on the concave mirror element can depend on an angle of incidence on the

Be inner surface of the positive lens falling light and / or laser beams and / or be dependent on the wavelength.

In an advantageous development of the invention, it is proposed that the target optical device has at least one further optical element, in particular an element designed as an injection-molded component, which is provided for coupling light and / or laser beams into the deflection unit. Preferably, the further optical element is made of a same material as at least partially a material of the deflection unit, in particular of the first optical injection-molded component. In this context, a "coupling in of light" is to be understood in particular as meaning that a radiation, in particular a light and / or laser radiation, can be introduced into the first optical injection-molded component for illuminating by the further optical injection-molded component, so that an advantageous view of In addition, a reference mark for sighting a measurement object is preferably formed by the coupled-in light radiation.

It is also proposed that at least partially a transmission reflection layer is arranged between the deflection unit and the further optical element. In this case, a "transmission reflection layer" should be understood to mean, in particular, a layer which is along a direction for the Layer incident light and / or laser radiation has a reflective effect and along a preferably opposite direction for incident on the layer of light and / or laser radiation has a transmission effect. Preferably, the transmission reflection layer is formed from a dielectric material and arranged at a border crossing between the deflection unit and the further optical element, wherein the deflection unit and the further optical element are in particular arranged directly adjacent to one another. In principle, it is also conceivable that the transmission reflection layer is formed by an adhesive, with which the deflecting unit and the further optical element are glued together. In this case, an advantageous combination of functions can be achieved by virtue of a transition between the deflecting unit and the further optical injection-molded component being substantially transparent to radiation which is coupled into the deflecting unit and to radiation impinging on the transmissive reflection layer from an interior of the deflecting unit Is substantially impermeable or reflective.

In particular, the further optical element has a surface which is parallel to a surface of the deflection element and / or of the first lens element.

It is further proposed that the target optical device at least one

Radiation source for generating radiation, which is provided for the distance measurement and for targeting a test object, which advantageously further components, space, installation costs and costs can be advantageously saved. In this case, the radiation source can be formed by a laser radiation source and / or a light radiation source, for example an LED, the radiation source being provided in particular for emitting visible radiation. Preferably, in this case, the radiation coupled into the deflecting unit is at least partially used for a measuring operation and the remaining radiation for sighting of the object to be measured, wherein the remaining radiation in particular forms a visible radiation spot, such as a visible laser spot.

Furthermore, the invention is based on a distance measuring device, in particular a laser range finding device, with at least one Zieloptikvorrich- device. It can be a particularly space-saving and especially compact te configuration of the laser rangefinder can be achieved and thus an ease of use of the laser rangefinder can be increased.

Furthermore, the invention is based on a mounting method for a distance measuring device with a target optical device, wherein in a first step a

Deflection unit is made together with a first and / or a second optical lens element and then the assembly is mounted in the distance measuring device. In one embodiment of the manufacturing method according to the invention, in a first step, a deflection unit is produced together with a first and / or a second optical lens element, in a second step the deflection unit is provided with a further optical element, in particular an injection-molded component serving for coupling into the deflection unit mounted a unit and then mounted the unit in the distance measuring device.

In one embodiment of the manufacturing method according to the invention, in a first step, a deflection unit is produced together with a first and / or a second optical lens element, in a second step the deflection unit with a further optical element, in particular an injection molding component serving for coupling into the deflection unit to form a structural unit mounted and then mounted this unit in the distance measuring device.

In one embodiment of the manufacturing method according to the invention, in a first step a deflection unit is produced together with a first and / or a second optical lens element, in a second step the deflection unit is provided with further optical elements, in particular an injection-molded component serving for coupling into the deflection unit and / or or a light source, in particular a laser light source and / or an adjusting device mounted to a unit and then mounted this unit in the distance measuring device.

In this case, a structurally simple assembly of the distance measuring device can be advantageously achieved while saving on production times and costs. In addition, a particularly advantageous and simple adjustment of the target optical device can be achieved prior to assembly of the distance measuring device. This is to be understood by "a structural unit" in particular a single unit.

drawing

Further advantages emerge from the following description of the drawing. In the drawing, an embodiment of the invention is shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Show it:

1 shows a measuring device with a target optical device in a schematic

Presentation,

2 shows the target optical device together with a radiation source for distance measurement, which is formed separately from the target optical device, in a schematic representation,

Fig. 3, the target optical device in a detailed view and

Fig. 4 shows an alternative embodiment of the target optics device in a detail.

Description of the embodiments

FIG. 1 shows a measuring device formed by a distance measuring device 12, which has a target optical device 10 that is surrounded by a housing 54 of the distance measuring device 12. The distance measuring device 12 is in this case formed by a laser rangefinder. Furthermore, the laser distance measuring device has a display unit 56, which is provided for outputting a measurement result in the operation of the laser range finding device, and an input unit 58 with a plurality of input keys, which leads to an operation of the laser rangefinder provided by an operator. FIG. 2 schematically shows a construction of the laser range finding device with a transmission unit 92, a detection unit 96 and a target optical device 10. The transmitting unit 92 has a first radiation source 98, which is formed by a laser radiation source, such as a laser diode, which is provided for generating a laser beam 100 for a measuring operation (FIG. 2). In the measuring operation, the laser beam 100 is directed to an aimed measuring object 64, for example a wall surface, and a distance between the laser distance measuring device and the measuring object 64 is determined on the basis of a beam reflected by the measuring object 64 and received by the laser distance measuring device by means of the detection unit 96.

The aiming optics device 10 of the laser range finding device 12 is shown in more detail in FIGS. 2 and 3. The aiming optical device 10 comprises an optical unit 14, which has an optical deflection unit 16 and a first optical lens element 18, wherein the optical deflection unit 16 is formed integrally with the first optical lens element 18. Furthermore, the optical unit 14 has a second optical lens element 28, which is likewise formed integrally with the optical deflection unit 16 (FIG. 3). In principle, however, it is conceivable that the second optical lens element 28 is formed separately from the optical deflection unit 16 or consists of a plurality of lenses, of which a subset is separate from the optical

Deflection unit 16 is formed. The same applies to the first optical lens element 18.

The optical deflection unit 16 is formed together with the first optical lens element 18 and the second optical lens element 28 by an injection molded optical component 22, preferably formed of a material with a transparent and non-polar thermoplastic, such as the cyclo-olefin polymer Zeonex , Alternatively, however, it is conceivable that the first optical lens element 18 and / or the second optical lens element 28 is formed at least partially from a material different from the material of the optical deflection unit 16, in particular the optical injection molded component 22, and the first optical lens element 18 and / or. or the second optical lens element 28 is / are integrated into the optical deflection unit 16, in particular the optical injection-molded component 22, by at least partial encapsulation. The optical deflection unit 16 comprises a prism formed by a pentagonal prism 20, the pentagonal prism 20 having a pentagonal and / or five-sided cross-sectional area 66. The pentaprism 20 includes a first surface 40 and a second surface 42 that are directly adjacent and / or directly adjacent to one another. The first and second surfaces 40, 42 are arranged substantially perpendicular to each other. The pentaprism 20 also has a third surface 44, which also directly adjoins the first surface 40, wherein the first and the third surface 40, 44 form an angle of greater than 90 ° to each other. A fourth surface 46 of the pentaprism 20 directly adjoins the second surface 42, with the second and fourth surfaces 42, 46 enclosing an angle of greater than 90 ° to one another. The third and fourth surfaces 44, 46 also form an angle to each other of substantially 45 °. Between the third and the fourth surface 44, 46 a fifth surface 68 of the pentaprism 20 is arranged.

The first optical lens element 18 and the second optical lens element 28 are each arranged on a surface 40, 42 of the optical deflection unit 16, in particular of the pentaprism 20, wherein the first optical lens element 18 on the first surface 40 and the second optical lens element 28 on the second surface 42 of the pentaprism 20 is arranged. The first optical lens element 18 is formed by a converging lens 24 which is designed as an objective 70 of the optical unit 14, wherein a convex curvature of the converging lens 24 is arranged on an outer surface of the optical deflection unit 16, in particular of the pentaprism 20. The second optical lens element 28 is formed by a diverging lens 30, which is designed as an eyepiece 72 of the optical unit 14. The converging lens 24 and the diverging lens 30 are thus arranged substantially perpendicular to each other. The diverging lens 30 has a concave curvature, which is likewise arranged on an outer surface of the optical deflection unit 16, in particular of the pentaprism 20.

Furthermore, the optical unit 14 has a plurality of coatings 32, 34, 36, 38, which are arranged on the different surfaces 40, 42, 44, 46 of the deflection unit 16. An at least partially specular and / or reflective coating 32 is applied to a convex curvature-comprising portion of the first surface 40, and the light and / or laser beams 62 coming from an interior of the optical deflection unit 16 to an inner surface 74 of a lens surface of the converging lens 24 and / or hit the coating 32, has a reflective and / or reflective effect and / or at least a transmission-reducing effect. The Sam The lens lens 24 thus acts as a concave mirror 26 with a reflecting surface 48 for light and / or laser beams 62 hitting the inside, while the coating 32 for radiation impinging on the convex curvature from the outside is substantially permeable. The coating 32 is tuned to a wavelength of the laser beam 62, so that a transmission of the laser beam 62 to the concave mirror 26 is reduced and at least partial reflection of the laser beam 62 takes place on the concave mirror 26. The coating 32 is in this case formed by a dielectric coating. In an alternative embodiment of the target optical device 10, it is also conceivable to dispense with a coating 32, 34, 36, 38 of the surfaces 40, 42, 44, 46 of the deflection unit 16.

A reflective and / or reflective coating 36, 38 is also applied to the third surface 44 and the fourth surface 46, so that on the two surfaces 44, 46 also light and / or laser beams 62, from the interior of the optical deflection unit 16 on the coating 36, 38 meet, reflected and / or mirrored. The third and fourth surfaces 44, 46 are each formed as a reflecting surface 50, 52, wherein the two reflective surfaces 50, 52 form an angle of substantially 45 ° to each other. The two reflective surfaces 50, 52 are in this case formed as a flat mirror. The reflective and / or reflective coating 36, 38 is in this case tuned to a wavelength of the light and / or laser beam 62 passing through the deflecting unit 16, so that a reflective and / or reflective property of the coating takes place mainly for this radiation. In addition, at least the reflective surface 52 for radiation, in particular laser radiation, which impinges on the coating 38 from outside the optical deflection unit 16 has a transmission property, so that this radiation can be coupled into the optical deflection unit 16 and the coating 38 for this Radiation is at least partially transparent. The coating 36, 38 is formed, for example, at least partially by a dielectric coating, which is formed at least on the fourth surface 46 at least partially by a transmission reflection layer 90.

The second surface 42 of the optical deflection unit 16 also has a coating 34, which is formed by an antireflection coating, so that an undesired reflection of light and / or laser radiation to the diverging lens 30 is advantageously prevented and a noise-reduced or trouble-free view by means of the eyepiece 72 is reached for the operator. The first optical lens element 18 and the second optical lens element 28 are arranged with respect to the two surfaces 44, 46 formed as reflecting surfaces 50, 52 or flat mirrors such that radiation impinges substantially perpendicular to a main optical plane of the first optical lens element 18 or radiates, is reflected and / or reflected by the fourth surface 46, and that radiation incident or radiating substantially perpendicular to a main optical plane of the second optical lens element 28 is mirrored and / or reflected by the third surface 44 or hit them.

The deflection unit 16 formed integrally with the first and the second optical lens elements 18, 28 is arranged within the target optical device 10 in such a way that rays which strike the lens 70 from the outside, in particular from the measurement object 64 emanate rays 76. Along an axis 78, which is oriented substantially perpendicular to the first surface 40 of the pentaprism 20, from the converging lens 24 in a direction 80 of the fourth surface 46 of the optical deflection unit 16, a further optical element 82 is arranged after the fourth surface 46 and after this a radiation source 60 formed by a laser diode. The further optical element 82 is provided for coupling the laser beam 62 emitted by the radiation source 60 into the optical deflection unit 16. In addition, the further optical element 82 is formed from the same material as the pen-taprism 20, so that refraction of the laser beam 62 emitted by the radiation source 60 along the axis 78 from the further optical element 82 to the pentaprism 20 due to the same optical media is.

Along the axis 78, a transmission reflection layer 90 is arranged between the fourth surface 46 of the deflection unit 16 and the further optical element 82, so that the laser beam 62 emitted by the radiation source 60 is coupled into the deflection unit 16 during operation, but an exit of radiation is prevented from the deflection unit 16 out over the fourth surface 46. Alternatively, the transmission reflective layer 90 may also be attached to the further optical

Element 82 may be arranged and / or by an adhesive to which the deflection unit 16 and the further optical element 82 are bonded, be formed. Furthermore, an embodiment of the further optical element 82 with a material that is different from the pentaprism 20 is conceivable at any time, with two adjoining ones reaching an effective coupling of the laser beam 62 into the pentaprism 20

Surfaces of the further optical element 82 and the pentaprism 20 an angle may include greater than 0 ° and / or for this purpose, an angle of incidence of the laser beam 62 in the further optical element 82 and / or in the pentaprism 20 may be varied.

During operation of the laser range finding device, the laser beam 62 generated by the radiation source 60 is emitted by the radiation source 60 along the axis 78 in the direction of the optical deflection unit 16 and initially strikes a surface 84 of the further optical element 82 facing the radiation source 60 optical axis of the laser beam 62 on the surface 84 of the further optical element 82 is almost 90 °, so that the laser beam 62 at the

Surface 84 undergoes no refraction and / or change in direction and a reflection of the laser beam 62 is almost prevented and / or minimized.

In the further optical element 82, which serves the coupling in the deflection unit 16, also, in particular in one piece, a further lens element may be incorporated, for example, to make a steel adjustment of the beam 62. In an alternative embodiment of the invention, it is also conceivable that by means of the laser beam 62 generated by the radiation source 60, a radiation of the entire optical unit 14 is insufficient, so that between the Strahlungsquel- Ie 60 and the further optical element 82, a further optical lens element, which is in particular formed by a diverging lens is arranged, which is provided for illuminating the entire optical unit 14.

The laser beam 62 is guided within the further optical element 82, which may be formed in particular as an injection molded part, in the direction of the optical deflection unit 16. Due to the fact that the optical deflection unit 16 is formed by the optical injection molded component 22 and the coating 36 on the surface 46 is transparent to the laser beams 62, the laser beam 62 experiences no at the transition between the optical injection molded component 22 and the further optical element 82 Deflection. The laser beam 62 extends within the deflection unit

16 along the axis 78 in the direction of the converging lens 24 and is reflected by the coating 32 on the first surface 40 partially in the direction of the fourth surface 46 of the optical deflection unit 16 along the axis 78. This reflected laser beam 62 is used as the target marker 86 and / or reference marker for sighting the target 64, with the target marker 86 being visible to the operator as a visible, such as a red spot and / or spot. This target mark 86, along with an imaging beam 88 of a targeted point of the measuring object 64, is directed along the axis 78 toward the fourth surface 46 formed by the reflecting surface 52, the imaging beam 88 being coupled into the optical deflecting unit 16 by the converging lens 24 , The aiming marker 86, together with the imaging beam 88, impinge on the fourth surface 46 and is reflected there due to the coating 38, in which case an angle of incidence is equal to a reflection angle. The target mark 86 and the imaging beam 88 reflected on the fourth surface 46 are reflected on the fourth surface 46 in the direction of the third surface 44 and are likewise reflected by the coating 36 and deflected in the direction of the diverging lens 30. Through the diverging lens 30, the two beams appear visible to an operator, wherein on the retina of the operator, a sharp image of the measuring object 64 and the reference mark by means of the diverging lens 30 is generated. By means of the converging lens 24 and the diverging lens 30, together with the two reflecting surfaces 50, 52 formed as flat mirrors, an enlarged illustration according to FIG

Principle of Galileo telescope done.

The target optical device 10 is formed together with the radiation source 60 as an assembly that can be installed in a structurally simple manner and in particular further mounting steps saving in the laser rangefinder during a manufacturing process of the laser rangefinder, wherein during a mounting process first formed by the pentaprism 20 deflection unit 16 produced together with the two optical lens elements 18, 28 by injection molding and the coatings 32, 34, 36, 38 are applied to the deflection unit 16 and / or the further optical element 82 and then the

Deflection unit 16 is mounted with the further optical element 82 and / or the radiation source 60 to a unit 94. In this case, an adjustment of the target optics device 10 takes place in that the optical deflection unit 16 and the further optical element 82 and / or the radiation source 60 are matched to one another. Subsequently, the preassembled and adjusted assembly 94 is mounted in the distance measuring device 12.

In an alternative embodiment of the invention, a refinement of the target marking 86 in the form of an inserted crosshair and / or further target markers 86 that appear appropriate to the person skilled in the art is also conceivable at any time. FIG. 4 shows an alternative embodiment of a distance measuring device 12 to FIGS. 2 and 3. Substantially identical components, features and functions are basically numbered by the same reference numerals. In order to distinguish the exemplary embodiments, the letter a is added to the reference symbols of the following exemplary embodiment. The following description is essentially limited to the differences from the exemplary embodiment in FIGS. 2 and 3, wherein reference can be made to the description of the exemplary embodiment in FIGS. 2 and 3 with regard to components, features and functions remaining the same.

The distance measuring device 12a according to FIG. 4, which is formed by a laser distance measuring device, has only a single radiation source 60a, which is intended both for generating radiation, which is used for a distance measurement and for aiming a measuring object 64a during operation, compared with the laser distance measuring device from FIGS , The radiation source 60a is in this case formed by a laser diode. The radiation is formed by a laser beam 62a, which has both the function of a laser beam 100a designed for a distance measurement and the function of a target mark 86a for sighting the test object 64a.

The objective optical device 10a according to FIG. 4 has an optical deflection unit 16a formed by a pentaprism 20a, which has at least one coating 38a formed by at least partially a transmission reflection layer 90a. This coating 38a is arranged on a fourth surface 46a of the optical deflection unit 16a facing the radiation source 60a. Through this coating 38a, a portion of the laser light is filtered out, so that the laser beam 62a penetrates with reduced intensity in the optical deflection unit 16a. This reduced intensity of the laser beam 62a allows the use of a conventional laser source as the radiation source 60a, without fear of operator harm in viewing the target mark 86a. A portion of the laser beam 62a extending along an axis 78a in the direction of a first optical lens element 18a formed by a condenser lens 24a is deflected by a coating 32a on a first surface 40a of the deflector 16a partially toward the fourth surface 46a of the optical deflector 16a Substantially reflected along the axis 78a, wherein the coating 32a has both a transmission property and a reflection property, so that a partial beam of the laser beam 62a leaves the deflection unit 16a through the converging lens 24a and a partial beam of La serstrahls 62a is reflected on the coating 32a. This reflected portion of the laser beam 62a is used as the target mark 86a and / or reference mark for sighting the measuring object 64a. A portion of the laser beam 62a, which leaves the deflection unit 16a in the direction of the measuring object 64a through the converging lens 24a, serves as a laser beam 100a provided for the distance measurement.

Claims

claims

1 . Target optics device for a measuring device, in particular for a distance measuring device (12; 12a), comprising an optical unit (14; 14a) which has at least one optical deflection unit (16; 16a) and a first optical lens element (18; 18a), characterized in that the optical deflecting unit (16, 16a) and the first optical lens element (18, 18a) are at least partially formed integrally with one another.

2. Target optics device according to claim 1, characterized in that the optical deflecting unit (16; 16a) has at least one prism, in particular a pentaprism (20; 20a).

3. Target optics device according to one of the preceding claims, characterized in that the optical deflecting unit (16; 16a) is at least partially formed by an optical injection-molded component (22; 22a).

4. Target optics device according to one of the preceding claims, characterized in that the first optical lens element (18; 18a) is at least partially formed by a converging lens (24; 24a).

5. Target optics device according to one of the preceding claims, characterized in that the optical unit (14; 14a) forms at least one concave mirror (26; 26a) which is at least partially formed by the first optical lens element (18; 18a).

6. Target optics device according to one of the preceding claims, characterized in that the optical unit (14; 14a) has at least one second optical lens element (28; 28a) which is formed at least partially in one piece with the optical deflection unit (16; 16a).

7. Target optics device according to claim 6, characterized in that the second optical lens element (28; 28a) is at least partially formed by a diverging lens (30; 30a).

8. Target optics device according to one of the preceding claims, characterized in that the optical unit (14; 14a) at least one coating (32, 34, 36, 38; 32a, 34a, 36a, 38a), which on or in at least one Surface (40, 42, 44, 46, 40a, 42a, 44a, 46a) of the optical deflection unit (16, 16a) is arranged.

9. A sighting optical device according to claim 8, characterized in that the coating (32, 36, 38; 32a, 36a, 38a) at least partially a reflective surface (48, 50, 52; 48a, 50a, 52a) of the optical deflection unit (16; 16a) forms.

10. aiming optical device according to one of the preceding claims, characterized in that the optical deflection unit (16) has at least two reflective surfaces (50, 52) which enclose an angle of substantially 45 ° to each other.

1 1. A target optical device according to any one of the preceding claims, characterized by at least one further optical element (82; 82a), in particular an injection molded component, which for coupling light and / or laser beams (62; 62a) in the deflection unit (16; ) is provided.

12. A target optical device according to claim 11, characterized in that between the deflection unit (16; 16a) and the further optical element (82; 82a) at least partially a transmission reflection layer (90; 90a) is arranged.

13. Target optics device according to one of the preceding claims, characterized by at least one radiation source (60a) for generating radiation, which is provided for the distance measurement and / or for sighting of a test object (64a).

14. Distance measuring device, in particular laser rangefinder, with at least one target optical device (10, 10a) according to one of the preceding claims.

15. A mounting method for a distance measuring device (12; 12a) according to claim

14, characterized in that in a first step a deflection unit (16; 16a) together with a first and / or a second optical lens element (18, 28; 18a, 28a) is produced as a structural unit, in particular a one-piece structural unit, and this Assembly (94, 94a) in the distance measuring device (12, 12a) is mounted.